import java.util.Scanner;
public class Example2_3 {
   public static void main (String args[ ]) {
      System.out.println("请输入若干个数，每输入一个数回车确认");
      System.out.println("最后输入数字0结束输入操作");
      Scanner reader = new Scanner(System.in);
      double sum = 0;
      double x = reader.nextDouble();
      while(x!=0){
        sum = sum+x;
        x = reader.nextDouble();
      }
      System.out.println("sum="+sum);
   }
}
